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  System and method for correcting defective pixels of a display deviceUSPTO Application #: 20060109286Title: System and method for correcting defective pixels of a display device Abstract: A method of displaying an image with a display device having at least one defective display pixel is provided. The method comprises generating first, second, and third sub-frames using image data for the image, information that identifies the at least one defective display pixel, a first pixel offset associated with the second sub-frame, and a sub-pixel offset associated with the third sub-frame, and alternating between displaying the first sub-frame in a first position, displaying the second sub-frame in a second position spatially offset from the first position according to the first pixel offset, and displaying the third sub-frame in a third position spatially offset from the first position and the second position according to the sub-pixel offset. (end of abstract) Agent: Hewlett Packard Company - Fort Collins, CO, US Inventors: Niranjan Damera-Venkata, Robert A. Ulichney, Daniel R. Tretter USPTO Applicaton #: 20060109286 - Class: 345690000 (USPTO) The Patent Description & Claims data below is from USPTO Patent Application 20060109286. Brief Patent Description - Full Patent Description - Patent Application Claims
CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application is related to U.S. patent application Ser. No. 10/213,555, filed on Aug. 7, 2002, entitled IMAGE DISPLAY SYSTEM Sep. 11, 2002, entitled IMAGE DISPLAY SYSTEM AND METHOD; AND METHOD; U.S. patent application Ser. No. 10/242,195, filed on U.S. patent application Ser. No. 10/242,545, filed on Sep. 11, 2002, entitled IMAGE DISPLAY SYSTEM AND METHOD; U.S. patent application Ser. No. 10/631,681, filed Jul. 31, 2003, entitled GENERATING AND DISPLAYING SPATIALLY OFFSET SUB-FRAMES; U.S. patent application Ser. No. 10/632,042, filed Jul. 31, 2003, entitled GENERATING AND DISPLAYING SPATIALLY OFFSET SUB-FRAMES; U.S. patent application Ser. No. 10/672,845, filed Sep. 26, 2003, entitled GENERATING AND DISPLAYING SPATIALLY OFFSET SUB-FRAMES; U.S. patent application Ser. No. 10/672,544, filed Sep. 26, 2003, entitled GENERATING AND DISPLAYING SPATIALLY OFFSET SUB-FRAMES; U.S. patent application Ser. No. 10/697,605, filed Oct. 30, 2003, entitled GENERATING AND DISPLAYING SPATIALLY OFFSET SUB-FRAMES ON A DIAMOND GRID; U.S. patent application Ser. No. 10/696,888, filed Oct. 30, 2003, entitled GENERATING AND DISPLAYING SPATIALLY OFFSET SUB-FRAMES ON DIFFERENT TYPES OF GRIDS; U.S. patent application Ser. No. 10/697,830, filed Oct. 30, 2003, entitled IMAGE DISPLAY SYSTEM AND METHOD; U.S. patent application Ser. No. 10/750,591, filed Dec. 31, 2003, entitled DISPLAYING SPATIALLY OFFSET SUB-FRAMES WITH A DISPLAY DEVICE HAVING A SET OF DEFECTIVE DISPLAY PIXELS; U.S. patent application Ser. No. 10/768,621, filed Jan. 30, 2004, entitled GENERATING AND DISPLAYING SPATIALLY OFFSET SUB-FRAMES; U.S. patent application Ser. No. 10/768,215, filed Jan. 30, 2004, entitled DISPLAYING SUB-FRAMES AT SPATIALLY OFFSET POSITIONS ON A CIRCLE; U.S. patent application Ser. No. 10/821,135, filed Apr. 8, 2004, entitled GENERATING AND DISPLAYING SPATIALLY OFFSET SUB-FRAMES; U.S. patent application Ser. No. 10/821,130, filed Apr. 8, 2004, entitled GENERATING AND DISPLAYING SPATIALLY OFFSET SUB-FRAMES; U.S. patent application Ser. No. 10/820,952, filed Apr. 8, 2004, entitled GENERATING AND DISPLAYING SPATIALLY OFFSET SUB-FRAMES; U.S. patent application Ser. No. 10/864,125, Docket No. 200401412-1, filed Jun. 9, 2004, entitled GENERATING AND DISPLAYING SPATIALLY OFFSET SUB-FRAMES; U.S. patent application Ser. No. 10/868,719, filed Jun. 15, 2004, entitled GENERATING AND DISPLAYING SPATIALLY OFFSET SUB-FRAMES, and U.S. patent application Ser. No. 10/868,638, filed Jun. 15, 2004, entitled GENERATING AND DISPLAYING SPATIALLY OFFSET SUB-FRAMES. Each of the above U.S. patent applications is assigned to the assignee of the present invention, and is hereby incorporated by reference herein. BACKGROUND [0002] A conventional system or device for displaying an image, such as a display, projector, or other imaging system, produces a displayed image by addressing an array of individual picture elements or pixels arranged in horizontal rows and vertical columns. A resolution of the displayed image is defined as the number of horizontal rows and vertical columns of individual pixels forming the displayed image. The resolution of the displayed image is affected by a resolution of the display device itself as well as a resolution of the image data processed by the display device and used to produce the displayed image. [0003] Typically, to increase a resolution of the displayed image, the resolution of the display device as well as the resolution of the image data used to produce the displayed image must be increased. Increasing a resolution of the display device, however, increases a cost and complexity of the display device. In addition, higher resolution image data may not be available and/or may be difficult to generate. SUMMARY [0004] One form of the present invention provides a method of displaying an image with a display device having at least one defective display pixel. The method comprises generating first, second, and third sub-frames using image data for the image, information that identifies the at least one defective display pixel, a first pixel offset associated with the second sub-frame, and a sub-pixel offset associated with the third sub-frame, and alternating between displaying the first sub-frame in a first position, displaying the second sub-frame in a second position spatially offset from the first position according to the first pixel offset, and displaying the third sub-frame in a third position spatially offset from the first position and the second position according to the sub-pixel offset. BRIEF DESCRIPTION OF THE DRAWINGS [0005] FIG. 1 is a block diagram illustrating an image display system according to one embodiment of the present invention. [0006] FIGS. 2A-2C are schematic diagrams illustrating the display of two sub-frames according to one embodiment of the present invention. [0007] FIGS. 3A-3E are schematic diagrams illustrating the display of four sub-frames according to one embodiment of the present invention. [0008] FIGS. 4A-4E are schematic diagrams illustrating the display of a pixel with an image display system according to one embodiment of the present invention. [0009] FIG. 5 is a diagram illustrating the generation of low resolution sub-frames from an original high resolution image using a nearest neighbor algorithm according to one embodiment of the present invention. [0010] FIG. 6 is a diagram illustrating the generation of low resolution sub-frames from an original high resolution image using a bilinear algorithm according to one embodiment of the present invention. [0011] FIG. 7 is a block diagram illustrating a system for generating a simulated high resolution image according to one embodiment of the present invention. [0012] FIG. 8 is a block diagram illustrating a system for generating a simulated high resolution image for two-position processing based on separable upsampling according to one embodiment of the present invention. [0013] FIG. 9 is a block diagram illustrating a system for generating a simulated high resolution image for two-position processing based on non-separable upsampling according to one embodiment of the present invention. [0014] FIG. 10 is a block diagram illustrating a system for generating a simulated high resolution image for four-position processing according to one embodiment of the present invention. [0015] FIG. 11 is a block diagram illustrating the comparison of a simulated high resolution image and a desired high resolution image according to one embodiment of the present invention. [0016] FIG. 12 is a diagram illustrating the effect in the frequency domain of the upsampling of a sub-frame according to one embodiment of the present invention. [0017] FIG. 13 is a diagram illustrating the effect in the frequency domain of the shifting of an upsampled sub-frame according to one embodiment of the present invention. [0018] FIG. 14 is a diagram illustrating regions of influence for pixels in an upsampled image according to one embodiment of the present invention. [0019] FIG. 15 is a diagram illustrating the generation of an initial simulated high resolution image based on an adaptive multi-pass algorithm according to one embodiment of the present invention. [0020] FIG. 16 is a diagram illustrating the generation of correction data based on an adaptive multi-pass algorithm according to one embodiment of the present invention. Continue reading... Full patent description for System and method for correcting defective pixels of a display device Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this System and method for correcting defective pixels of a display device patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. 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